## Backgrounds
I first reported this on discussion: #3194
## Issue description
There is a code sample
[here](https://typespec.io/docs/language-basics/namespaces#using-namespaces)
describing the scope of an item introduced by `using`.
```ts
namespace One {
model A {}
}
namespace Two {
using One;
alias B = A; // This is valid
}
alias C = One.A; // This is not valid
alias C = Two.B; // This is valid
```
## Expected result
The code should failed to compile because of `One.A`.
## Actual result
It compiles without any warning.
## How to fix
It appears that the original intent was to show that accessing an item
introduced with `using` outside the scope of `using` is not possible. In
this code, the 'invalid accessing' is `Two.A`.
## Changes
- change `One.A` to `Two.A`
7517c9175e